This compute calculates a per-particle vector, which can be accessed
by any command that uses per-particle values from a compute as input.
See How-to discussions, section 6.15 for
an overview of LAMMPS output options.

Restrictions

This compute is part of the USER-SMD package. It is only enabled if
LAMMPS was built with that package. See the Making LAMMPS section for more info. This compute
can only be used for particles which interact via the updated
Lagrangian or total Lagrangian SPH pair styles.